Lockdown SSH with TCPWrappers

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To ensure SSH access is not lost during this process you will need to add your IP to the allow list.

Access the server via command line

Edit the file

/etc/hosts.allow

After the comment lines add

sshd : YOURIP

So for example if your IP is 198.198.198.198, The line should look like this

sshd : 198.198.198.198

After you have added your IP to the allow list you can block other SSH access to the server.

Edit the file

/etc/hosts.deny

After the comment lines in this file add

sshd : all

SSH access should then be restricted to only your IP.

You can confirm the restriction is in place by attempting to SSH from any other host.